<!DOCTYPE html>
<html lang="en">
<head>
  <!-- Required meta tags -->
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

  <!-- Bootstrap CSS -->
  <link rel="stylesheet" href="./css/bootstrap.css">
  <style>
    .card-deck{
      /*background: #000000;*/
      /*margin-bottom: 2rem;*/
    }
   /* .row div{
      background: #399;
      border:1px solid #000000;
    }*/
  .carousel{
    background: #399;
    /*height:10%;*/
    max-height:20rem;
  }
    .carousel .carousel-inner .carousel-item{
      max-height:20rem;
    }
  </style>
</head>
<body>
<!--表单 -->
<div class="container">
  <form>
    <div class="form-group row">
      <label for="inputEmail3" class="col-sm-2 col-form-label">Email</label>
      <div class="col-sm-10">
        <input type="email" class="form-control" id="inputEmail3" placeholder="Email">
      </div>
    </div>
    <div class="form-group row">
      <label for="inputPassword3" class="col-sm-2 col-form-label">Password</label>
      <div class="col-sm-10">
        <input type="password" class="form-control" id="inputPassword3" placeholder="Password">
      </div>
    </div>
    <fieldset class="form-group">
      <div class="row">
        <legend class="col-form-legend col-sm-2">Radios</legend>
        <div class="col-sm-10">
          <div class="form-check">
            <label class="form-check-label">
              <input class="form-check-input" type="radio" name="gridRadios" id="gridRadios1" value="option1" checked>
              Option one is this and that&mdash;be sure to include why it's great
            </label>
          </div>
          <div class="form-check">
            <label class="form-check-label">
              <input class="form-check-input" type="radio" name="gridRadios" id="gridRadios2" value="option2">
              Option two can be something else and selecting it will deselect option one
            </label>
          </div>
          <div class="form-check disabled">
            <label class="form-check-label">
              <input class="form-check-input" type="radio" name="gridRadios" id="gridRadios3" value="option3" disabled>
              Option three is disabled
            </label>
          </div>
        </div>
      </div>
    </fieldset>
    <div class="form-group row">
      <div class="col-sm-2">Checkbox</div>
      <div class="col-sm-10">
        <div class="form-check">
          <label class="form-check-label">
            <input class="form-check-input" type="checkbox"> Check me out
          </label>
        </div>
      </div>
    </div>
    <div class="form-group row">
      <div class="col-sm-10">
        <button type="submit" class="btn btn-primary">Sign in</button>
      </div>
    </div>
  </form>
</div>




<script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.slim.min.js"></script>
<script src="https://cdn.bootcss.com/popper.js/1.11.0/umd/popper.min.js"></script>
<script src="./js/bootstrap.js"></script>

</body>
</html>